1166576891 has 2 divisors, whose sum is σ = 1166576892. Its totient is φ = 1166576890.

The previous prime is 1166576849. The next prime is 1166576893. The reversal of 1166576891 is 1986756611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1166576891 - 2¹⁰ = 1166575867 is a prime.

It is a Sophie Germain prime.

Together with 1166576893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1166576893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583288445 + 583288446.

It is an arithmetic number, because the mean of its divisors is an integer number (583288446).

Almost surely, 2^1166576891 is an apocalyptic number.

1166576891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166576891 is an equidigital number, since it uses as much as digits as its factorization.

1166576891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 50.

The square root of 1166576891 is about 34155.1883467212. The cubic root of 1166576891 is about 1052.6995962789.

The spelling of 1166576891 in words is "one billion, one hundred sixty-six million, five hundred seventy-six thousand, eight hundred ninety-one".